By Alexis Tereszcuk - Breaking Celebrity News Senior Reporter

Joan Rivers is a big fan of her daughter Melissa Rivers' [expletive] industry kingpin boyfriend, Vivid honcho Steve Hirsch, and she told Breaking Celebrity News exclusively why.

“I think it’s wonderful because I know more about the [expletive] business now,” Joan explained. “I could tell you who buys, what it’s about, what’s the latest technology, and every friend of mine is getting a tickler for Christmas.  Whether they want it or not.”

The mother/daughter duo is starring in WE’s hit reality show, Joan and Melissa: Joan Knows Best, and this season has shown the emotional split between Melissa and her last boyfriend, Jason Zimmerman, so in Tue